Piano escapement action

Details Piano escapement action Piano escapement action

1994-11-17

1996-04-30

Stanzione, Patrick J.

Music

Instruments

Stringed

84243, G10C 318

Patent

active

055114547

ABSTRACT:
An escapement action for a piano includes a hammershank having a first end mounted to pivot relative to the piano and a second end carrying a hammer to strike a tensioned string of the piano, with a knuckle disposed therealong between the first and second ends. A repetition support bearing against a key of the piano is mounted to pivot relative to the piano in response to depression of the key. A jack has a first portion extending from a pivot connection with the repetition support and defines a jack surface disposed for engagement with a knuckle surface, the jack arranged for escape of the jack surface from engagement with the knuckle surface during depression of the key. A spring urges the jack toward an "at rest" position with the jack surface in engagement with the knuckle surface. A jack retainer assembly dependent from the hammershank between the second end and the knuckle includes a cushion surface positioned to retain the jack in "at rest" position in opposition to force of the spring.

REFERENCES:
patent: 4854211 (1989-08-01), Tanaka et al.

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